package com.itheima;

public class Demo01DeBugSum {

    public static void main(String[] args) {

        System.out.println("main...start....");
        int a = 10;
        int b = 20;

        int sum = a + b;

        System.out.println("sum=" + sum);

        System.out.println("main...end....");
    }
}

